If you help anyone with a Nonsuch put up or take down their mast you will see that the masts are incredibly heavy and that their section at the top is much lighter than at the bottom, eg cantilever design. I haven't seen the hull structure that supports the mast but it has to be beefy as well.
Steve Hood S/V Diamond Girl C&C 34 Lions Head ON ------------------------------ Message: 15 Date: Sat, 11 Aug 2012 12:44:43 -0300 From: Graham Collins <[email protected]> To: [email protected] Subject: Re: Stus-List standing rigging Message-ID: <[email protected]> Content-Type: text/plain; charset=ISO-8859-1; format=flowed It is supported by a big structure in the hull. Look at it this way: you want to build a balcony off the side of your house. You can support it at the outside edge, typically with posts but you could use cables to suspend it. That's what we have. Alternatively you could cantilever it off the existing structure. Which is a different engineering problem altogether, as the loads are different. For example, an unstayed mast will have much less compressive loading on it, no stays pulling down on it, but will have a much bigger bending load. So the butt end tends to be pretty huge, but the top can be pretty light. - Graham dwight veinot wrote: > Over the last few weeks we have had several posts on standing rigging, > including shrouds and shroud tensions, baby stays, check stays, back stays, > fore stays and also on the mast itself and the spreaders on our C&C designed > boats. > > All this stuff needs regular inspection and sometimes insurance companies > insist that parts, in particular shrouds or turnbuckles be replaced after an > unspecified number of years just in case. > > I notice that those big Nonsuch boats carry a huge mainsail on a mast that > as far as I can see is unsupported by any standing rigging. > > My question is how that unsupported rig carries the forces on it without > breaking while our sloop rigged C&C's need such relatively elaborate > standing rigging. > > Anyone know?? > > Dwight Veinot > C&C 35 MKII, Alianna > Head of St. Margaret's Bay, NS _______________________________________________ This List is provided by the C&C Photo Album http://www.cncphotoalbum.com [email protected]
